We continue our journey through different mythologies to find all the stories about writing. This time it’s the turn of Norse mythology and the invention of runes. In the Poetic Edda, we are told that the god Odin (dedicated to wisdom and magic, among other things) hung himself on the tree Yggdrasil for nine nights, not receiving any kind of food or drink. This was a kind of self-sacrifice to himself that granted him the revelation of the runes. Since then, runes were used not only as a writing system, but also in magic and divination.
Odin fan art, taken from: https://odindevoted.wordpress.com/2013/03/31/giving-blood-to-the-runes/